| http://www.w3.org/ns/prov#value | - The 8th aspect of the present invention is a method of manufacturing a three-dimensional optical waveguide according to the 7th aspect, wherein the markers have one of a concave or convex shape, and wherein before the planar substrates are laminated, the planar substrates are positioned by applying light to the markers and causing the light to be reflected or transmitted by the markers.
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